An IntegratedTrust evaluation model based on multiagent system

摘要

The open and dynamic nature of the network environment makes it a challenge for multiagent system to work in a secure environment. One feasible way to minimize the threats is to evaluate the trust of interactive entities and use trust as the main reference element to assist agents in selecting the service providers in order to control the malicious agents. Aiming at these research problems, this paper proposes an IntegratedTrust evaluation model based on multiagent system. The mechanism obtains agent trust from the direct and indirect dimensions taking time decay factor into account. It assists the multiagent system in management by evaluating agent qualities like usability and threat after the trust detection and trust adjustment. Simulation analysis shows that IntegratedTrust is reasonable and sensitive in computing trust. Incorporating the principle of `slow rise and quick decline' and with the load-balancing mechanism, IntegratedTrust can effectively identify and control attacks.